The European Commission has started new investigations on whether Microsoft is abusing its dominant position on the Office market. The Commission will try to find out if Microsoft OOXML file format as implemented in Office 2007 is sufficiently interoperable with competitors' products.

The Commission's examination will therefore focus on all these areas, including the question whether Microsoft's new file format Office Open XML, as implemented in Office, is sufficiently interoperable with competitors' products.

Maybe Nellie Kroes could send a letter to Microsoft asking whether or not Office 2007 is compliant with ECMA-376, so that an AutoSpaceLikeWord95 can defeat the question of "sufficient interoperability".

However, I don't trust the OSP to be applicable throughout Europe and grant meaningful rights. Just read this:

These IPR commitments go beyond the requirements for ISO/IEC adoption of a standard, and ISO/IEC and Ecma have stated specifically that there are no IPR issues with Open XML.

ISO/IEC permit rand licensing which is totally unacceptable for an ubiquitous standard. It is no big deal to comply with their requirements. As of "there are no IPR issues" it needs a single patent from a third party to produce a real mess.